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A Coordinated Allocation Method of Single Beam and Dual Physical Effects Applicable to Uniform Laser Shock and Its Application

A technology of laser shock and physical effects, applied in laser welding equipment, improvement of process efficiency, manufacturing tools, etc., can solve problems such as adverse effects on service performance, residual stress holes, residual tensile stress, etc.

Active Publication Date: 2022-02-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the laser shock process, a "residual stress hole" phenomenon often occurs on the target surface, that is, the geometric center of the laser beam has a small residual compressive stress distribution, and even residual tensile stress
The formation of "residual stress holes" leads to uneven distribution of residual stress on the surface of the material, which will adversely affect its service performance

Method used

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  • A Coordinated Allocation Method of Single Beam and Dual Physical Effects Applicable to Uniform Laser Shock and Its Application
  • A Coordinated Allocation Method of Single Beam and Dual Physical Effects Applicable to Uniform Laser Shock and Its Application
  • A Coordinated Allocation Method of Single Beam and Dual Physical Effects Applicable to Uniform Laser Shock and Its Application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1 takes the establishment of the final database of the distribution ratio of the dual physical effects of "plasma shock" and "cavitation" in liquid confinement laser shock with variable confinement layer thickness as an example.

[0075] 1. Use 1.5mm thick K9 glass as the constrained layer to perform laser shock treatment on a metal material sample, and test the surface residual stress distribution of the material in the single beam irradiation area. Define the occurrence intensity of "plasma shock" and "cavitation" under this condition as 1:0.

[0076] 2. Set multiple groups of laser shock processing processes with different deionized water constrained layer thicknesses, and measure the residual stress distribution state of the single spot irradiation area. In this embodiment, the thickness of the deionized water is set to be 1 mm to 4 mm, and multiple sets of laser shock processing processes are set according to the rule that the thickness increases by 0.2 ...

Embodiment 2

[0086] Embodiment 2 takes the establishment of the final database of the distribution ratio of the dual physical effects of "plasma shock" and "cavitation" in the laser shock of the viscous liquid confinement of the variable confinement layer as an example.

[0087] 1. Use 1.5mm thick K9 glass as the constrained layer to perform laser shock treatment on a metal material sample, and test the surface residual stress distribution of the material in the single beam irradiation area. Define the occurrence intensity of "plasma shock" and "cavitation" under this condition as 1:0.

[0088] 2. On the basis of deionized water thickness of 1.6mm, multiple groups of laser shock processing processes with different viscosities of deionized water constrained layers were set up, and the residual stress distribution state of the single spot irradiation area was measured. In this embodiment, 0-80% glycerol is added to the deionized water, and 10% glycerol is added one by one according to the re...

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Abstract

The invention provides a method for coordinating distribution of single beam and double physical effects suitable for uniform laser shock and its application, belonging to the technical field of laser shock effect control. The present invention does not specify specific adjustment and allocation means, but only provides coordination principles and methods. Moreover, the present invention provides a universal and systematic method for setting the characteristic parameters of the absorbing layer that is suitable for large-scale laser shock uniform strengthening under liquid constraints, so that relevant technical personnel can quickly obtain liquids with a distribution ratio that meets its dual physical effects Restricting the laser shock processing technology is beneficial to the development and application of laser shock strengthening treatment, so it has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of laser shock effect control, and in particular relates to a coordinated distribution method of single beam and double physical effects suitable for uniform laser shock and its application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The pulsed laser can cause a plasma explosion on the surface of the material, resulting in an impact pressure on the order of GPa. Based on this physical basis, researchers have developed advanced laser shock strengthening technology. However, during the laser shock process, a "residual stress hole" phenomenon often occurs on the target surface, that is, the geometric c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D10/00
CPCC21D10/005B23K26/122B23K26/18B23K26/356B23K26/0624B23K31/12B23K31/003B23K26/70B23K26/073
Inventor 卢国鑫李恒季忠杉冈幸次姚倡锋李金山赵国群
Owner SHANDONG UNIV